Liquid flow pumping and mixing energy storage device

Abstract

The utility model discloses a liquid flow extraction and mixing energy storage device, which comprises an electric pile, a liquid flow extraction and mixing energy storage device, a liquid flow extraction and mixing energy storage device and a liquid flow extraction and mixing energy storage device, and is characterized in that an ion exchange membrane dividing the electric pile into an anode chamber and a cathode chamber is arranged; the liquid storage containers are arranged below the opposite galvanic piles in the height direction, and comprise a first liquid storage container connected with the anode chambers of the galvanic piles through a first electrolyte circulating pipeline and a second liquid storage container connected with the cathode chambers of the galvanic piles through a second electrolyte circulating pipeline; circulating drainage pumps are arranged on the first electrolyte circulating pipeline and the second electrolyte circulating pipeline, a generator is arranged on at least one of the first electrolyte circulating pipeline and the second electrolyte circulating pipeline, and the generator is arranged below the opposite electric pile in the height direction; according to the device, the gravitational potential energy of the electrolyte and part of kinetic energy brought to the electrolyte by the circulating drainage pump are fully converted into electric energy through acting of the generator, kinetic energy recovery of the electrolyte is achieved, and the energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a liquid flow pumping and mixing energy storage device. Background Technique

[0002] At present, flow batteries have broad application prospects in energy storage technology. Their characteristics such as high efficiency, adjustable capacity, and long cycle life make them an ideal choice in renewable energy integration, power grid regulation, and industrial applications. By balancing the volatility of renewable energy, improving power grid stability, and reducing energy costs, flow batteries are expected to become a key supporting technology for the clean energy transition in the future and contribute to achieving sustainable development goals.

[0003] With the development of flow battery technology, the application scale of flow batteries will surely become larger and larger, and the installed quantity of flow batteries will increase exponentially. At the same time, considering the growth of the electrolyte volume, combined with the unique characteristics of liquids and the inspiration of hydropower generation, combining flow batteries in electrochemical energy storage with mechanical energy storage is a new energy storage idea.

[0004] In a flow battery, the electrolyte is a liquid. The way of pumped-storage can be referred to, using the electrolyte as the medium in mechanical energy storage. The electrolyte is lifted from a lower place to a higher place by a drainage pump using the liquid level difference, which is an energy storage process of converting electrical energy into gravitational potential energy; using the liquid level difference of the liquid to drive a water turbine generator to do work, which is a discharge process of converting gravitational potential energy into electrical energy, thus completing the cycle of the energy storage and power generation system.

[0005] However, the existing flow batteries have the disadvantages of relatively large energy loss and low energy storage capacity. Content of the Utility Model

[0006] The purpose of the utility model is to provide a liquid flow pumping and mixing energy storage device, which can at least solve the problem of relatively large energy loss of flow batteries in the prior art.

[0007] The above object of the utility model can be achieved by the following technical solutions:

[0008] The present utility model provides a liquid flow pumping and mixing energy storage device, comprising: an electrolytic cell, in which an ion exchange membrane is arranged, and the ion exchange membrane divides the electrolytic cell into an anode chamber and a cathode chamber; a liquid storage container, in the height direction, the liquid storage container is arranged below the electrolytic cell, and a height difference is formed between the electrolytic cell and the liquid storage container. The liquid storage container includes a first liquid storage container and a second liquid storage container. The first liquid storage container is connected to the anode chamber of the electrolytic cell through a first electrolyte circulation pipeline, and the second liquid storage container is connected to the cathode chamber of the electrolytic cell through a second electrolyte circulation pipeline. Circulation drainage pumps are arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. At least one of the first electrolyte circulation pipeline and the second electrolyte circulation pipeline is provided with a generator, and in the height direction, the generator is arranged below the electrolytic cell; a branch pipeline is arranged on the electrolyte circulation pipeline provided with the generator. The branch pipeline has opposite inlet and outlet ends along its extending direction. The inlet end and the outlet end are respectively connected to the electrolyte circulation pipelines at both ends of the generator, and the outlet end is located on the electrolyte circulation pipeline between the generator and the liquid storage container; a control valve is used to control the flow direction of the electrolyte in the electrolyte circulation pipeline provided with the generator; the liquid flow pumping and mixing energy storage device has a first working state and a second working state during the energy release stage of mechanical energy storage. In the first working state, the control valve conducts the electrolyte circulation pipeline provided with the generator, so that the electrolyte in the electrolytic cell flows through the generator to do work and then enters the liquid storage container; in the second working state, the control valve conducts the branch pipeline, so that the electrolyte in the electrolytic cell directly enters the liquid storage container. Specifically, the circulation drainage pumps include a first circulation drainage pump and a second circulation drainage pump. The first circulation drainage pump is arranged on the first electrolyte circulation pipeline, and the second circulation drainage pump is arranged on the second electrolyte circulation pipeline.

[0009] Preferably, generators are arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. The generators include a first generator and a second generator. The first generator is arranged on the first electrolyte circulation pipeline, and the second generator is arranged on the second electrolyte circulation pipeline.

[0010] Furthermore, at least one auxiliary liquid storage container is further arranged on at least one of the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. In the height direction, at least one auxiliary liquid storage container is arranged above the generator, and at least one auxiliary liquid storage container is used for storing the electrolyte flowing through the circulation drainage pump and the electrolytic cell.

[0011] Preferably, the auxiliary liquid storage container has a conical structure, and along the direction of gravity, the cross-sectional area of the auxiliary liquid storage container is set to decrease.

[0012] Preferably, an auxiliary liquid storage container is provided on each of the first electrolyte circulation pipeline and the second electrolyte circulation pipeline.

[0013] Specifically, the auxiliary liquid storage container includes a first auxiliary liquid storage container and a second auxiliary liquid storage container. The first auxiliary liquid storage container is arranged on the first electrolyte circulation pipeline, and the second auxiliary liquid storage container is arranged on the second electrolyte circulation pipeline.

[0014] Preferably, the first generator is arranged at a height of -200 cm to 200 cm from the liquid level of the first liquid storage container, and the second generator is arranged at a height of -200 cm to 200 cm from the liquid level of the second liquid storage container.

[0015] Preferably, along the height direction, the first generator is arranged higher than the liquid level of the first liquid storage container, and the second generator is arranged higher than the liquid level of the second liquid storage container.

[0016] Preferably, the control valve includes a first switching valve and a second switching valve. The first switching valve is arranged on the branch pipeline, and the second switching valve is arranged on the electrolyte circulation pipeline between the inlet end and the generator. The features and advantages of the present utility model are as follows: The liquid flow pumping and mixing energy storage device provided by the present utility model includes an electrolytic cell and a liquid storage container arranged at a lower position relative to the electrolytic cell. The electrolyte in the liquid storage container is discharged to the electrolytic cell and the rear pipeline through a circulating drainage pump arranged between the electrolytic cell and the liquid storage container, and the gravitational potential energy of the electrolyte and part of the kinetic energy brought by the circulating drainage pump to the electrolyte are fully converted into electric energy by a generator arranged at a lower position relative to the electrolytic cell, realizing the kinetic energy recovery of the electrolyte and improving the energy utilization rate. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the liquid flow pumping and mixing energy storage device provided by the embodiment of the present utility model, in which no auxiliary liquid storage container is provided on the first electrolyte circulation pipeline and the second electrolyte circulation pipeline;

[0019] Figure 2Schematic diagram of the structure of the liquid flow pumping and mixing energy storage device provided by the embodiment of the present utility model, in which an auxiliary liquid storage container is arranged on the second electrolyte circulation pipeline;

[0020] Figure 3 Schematic diagram of the structure of the liquid flow pumping and mixing energy storage device provided by the embodiment of the present utility model, in which an auxiliary liquid storage container is arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline.

[0021] Explanation of the reference numerals in the drawings:

[0022] 100, stack; 110, ion exchange membrane; 120, anode chamber; 130, cathode chamber;

[0023] 200, first liquid storage container;

[0024] 300, second liquid storage container;

[0025] 400, first circulation drainage pump;

[0026] 500, second circulation drainage pump;

[0027] 600, first generator;

[0028] 700, second generator;

[0029] 800, first auxiliary liquid storage container;

[0030] 900, second auxiliary liquid storage container;

[0031] 10, first electrolyte circulation pipeline;

[0032] 20, second electrolyte circulation pipeline;

[0033] 30, branch pipeline;

[0034] K1, first switching valve;

[0035] K2, second switching valve. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] As Figures 1 to 3As shown in the figure, the present utility model provides a liquid flow pumping and mixing energy storage device, comprising: a stack 100, in which an ion exchange membrane 110 is arranged, and the ion exchange membrane 110 divides the stack 100 into an anode chamber 120 and a cathode chamber 130; a liquid storage container, which is arranged below the stack 100 in the height direction, and a height difference is formed between the stack 100 and the liquid storage container. The liquid storage container includes a first liquid storage container 200 and a second liquid storage container 300. The first liquid storage container 200 is connected to the anode chamber 120 of the stack 100 through a first electrolyte circulation pipeline 10, and the second liquid storage container 300 is connected to the cathode chamber 130 of the stack 100 through a second electrolyte circulation pipeline 20. Circulation drainage pumps are arranged on both the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. A generator is arranged on at least one of the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. In the height direction, the generator is arranged below the stack 100; a branch pipeline 30, which is arranged on the electrolyte circulation pipeline where the generator is arranged. The branch pipeline 30 has opposite inlet and outlet ends along its extending direction. The inlet and outlet ends are respectively connected to the electrolyte circulation pipelines at both ends of the generator, and the outlet end is located on the electrolyte circulation pipeline between the generator and the liquid storage container; a control valve, which is used to control the flow direction of the electrolyte in the electrolyte circulation pipeline where the generator is arranged; the liquid flow pumping and mixing energy storage device has a first working state and a second working state during the energy release stage of mechanical energy storage. In the first working state, the control valve conducts the electrolyte circulation pipeline where the generator is arranged, so that the electrolyte in the stack 100 flows through the generator to do work and then enters the liquid storage container; in the second working state, the control valve conducts the branch pipeline 30, so that the electrolyte in the stack 100 directly enters the liquid storage container. Among them, the mechanical energy storage of the liquid flow pumping and mixing energy storage device includes an energy storage stage and the above-mentioned energy release stage. In the energy storage stage, the electrolyte in the liquid storage container flows through the circulation drainage pump to reach the stack 100; in the first working state of the energy release stage, the electrolyte in the stack 100 flows through the generator to do work and then enters the liquid storage container; in the second working state of the energy release stage, the electrolyte in the stack 100 directly enters the liquid storage container through the branch pipeline 30. In this way, the traditional flow battery is combined with mechanical energy storage, so as to correspondingly select the first working state in the energy release stage when needed, thereby recovering most of the remaining kinetic energy after the electrolyte flows through the stack 100, achieving the effect of energy recovery.

[0038] Specifically, as Figures 1 to 3As shown, the stack 100 is arranged at a high position relative to the liquid storage container. The stack 100 includes an anode chamber 120 and a cathode chamber 130. The liquid storage container includes a first liquid storage container 200 and a second liquid storage container 300. The anode chamber 120 is connected to the first liquid storage container 200 through a first electrolyte circulation pipeline 10, and the cathode chamber 130 is connected to the second liquid storage container 300 through a second electrolyte circulation pipeline 20. Circulation drainage pumps are arranged on both the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. The circulation drainage pumps are used to drain the electrolyte in the liquid storage container into the stack 100 and the subsequent pipelines to achieve energy storage. A generator is provided on at least one of the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. And in the height direction, the generator is arranged at a low position relative to the stack 100, so that in the first working state during the energy release stage, the gravitational potential energy of the electrolyte and part of the kinetic energy brought by the circulation drainage pump to the electrolyte can be fully converted into electrical energy by the generator, realizing the kinetic energy recovery of the electrolyte and improving the energy utilization rate.

[0039] Among them, the pump consumption of the circulation drainage pump is mainly used to overcome the work done by the electrolyte flowing through the inside of the stack 100. In order to maintain a stable flow rate of the electrolyte, the circulation drainage pump needs a large power to drive the electrolyte to flow. Therefore, after the electrolyte flows through the stack 100 at a high position, it will have a lot of kinetic energy and gravitational potential energy. The present invention combines a traditional flow battery with mechanical energy storage to convert the excess energy of the electrolyte into electrical energy, reducing energy loss and improving the energy utilization efficiency. Among them, the calculation formula for the gravitational potential energy of the electrolyte flowing through the generator is: E = ρVgΔh, where E is the gravitational potential energy, ρ is the density of the electrolyte, V is the volume of the electrolyte flowing through the generator, and Δh is the liquid level difference of the electrolyte from the starting flow point to the generator during the energy release stage. In this embodiment, a water turbine generator is preferably selected for the generator, and the electrical energy generated by the electrolyte flowing through the generator to make the generator do work is supplied to the outside through the gravitational energy storage output terminal connected to the generator.

[0040] According to an embodiment of the present invention, as Figures 1 to 3As shown, the control valve includes a first switching valve K1 and a second switching valve K2. The first switching valve K1 is disposed on the branch pipeline 30, and the second switching valve K2 is disposed on the electrolyte circulation pipeline between the inlet end and the generator. Specifically, when the second switching valve K2 is opened and the first switching valve K1 is closed, the liquid flow pumping and mixing energy storage device enters the first working state in the energy release stage, and the electrolyte in the fuel cell stack 100 flows through the generator to do work and then enters the liquid storage container; when the second switching valve K2 is closed and the first switching valve K1 is opened, the liquid flow pumping and mixing energy storage device enters the second working state in the energy release stage, and the electrolyte in the fuel cell stack 100 directly enters the liquid storage container through the branch pipeline. That is, when not generating electricity, the second switching valve K2 is closed and the first switching valve K1 is opened, and the electrolyte is directly led to the liquid storage container through the branch pipeline 30, and only the normal operation of the liquid flow battery needs to be maintained, which will not be elaborated here. Among them, the control valve may also be a three-way valve disposed at the connection between the inlet end of the branch pipeline 30 and the electrolyte circulation pipeline, and the present application does not limit this.

[0041] According to an embodiment of the present invention, as Figure 1 and Figure 3 shown, to maximize the kinetic energy recovery of the electrolyte, generators are provided on both the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. The generators include a first generator 600 and a second generator 700. The first generator 600 is disposed on the first electrolyte circulation pipeline 10, and the second generator 700 is disposed on the second electrolyte circulation pipeline 20. Specifically, as Figure 1 and Figure 3 shown, along the flowing direction of the electrolyte in the first electrolyte circulation pipeline 10, a first generator 600 is provided on the first electrolyte circulation pipeline 10 from the fuel cell stack 100 to the first liquid storage container 200. Along the flowing direction of the electrolyte in the second electrolyte circulation pipeline 20, a second generator 700 is provided on the second electrolyte circulation pipeline 20 from the fuel cell stack 100 to the second liquid storage container 300.

[0042] According to a preferred embodiment of the present invention, to enable the electrolyte to smoothly flow into the liquid storage container after doing work through the generator, the first generator is disposed at a height of -200 cm to 200 cm from the liquid level of the first liquid storage container, and the second generator is disposed at a height of -200 cm to 200 cm from the liquid level of the second liquid storage container.

[0043] Preferably, in the height direction, the first generator 600 is disposed higher than the liquid level of the first liquid storage container 200, and the second generator 700 is disposed higher than the liquid level of the second liquid storage container 300. Thus, by disposing the first generator 600 at a high position relative to the liquid level of the first liquid storage container 200 and disposing the second generator 700 at a high position relative to the liquid level of the second liquid storage container 300, the configuration parameter requirements of the circulation drainage pump are reduced, and cost savings are achieved.

[0044] According to a preferred embodiment of the present utility model, the electrolyte used in the liquid flow pumping and mixing energy storage device is one or a combination of ferrochromium liquid, zinc bromine liquid, all-iron liquid, and lead-acid liquid. Of course, the electrolyte in the liquid flow pumping and mixing energy storage device can also adopt other liquid flows with good ion transport effects, and the present utility model does not limit this.

[0045] According to an embodiment of the present utility model, as Figures 1 to 3 shown, the circulating drainage pump includes a first circulating drainage pump 400 and a second circulating drainage pump 500. The first circulating drainage pump 400 is arranged on the first electrolyte circulation pipeline 10, and the second circulating drainage pump 500 is arranged on the second electrolyte circulation pipeline 20. Specifically, as Figures 1 to 3 shown, along the flowing direction of the electrolyte in the first electrolyte circulation pipeline 10, a first circulating drainage pump 400 is provided on the first electrolyte circulation pipeline 10 from the first liquid storage container 200 to the stack 100. Along the flowing direction of the electrolyte in the second electrolyte circulation pipeline 20, a second circulating drainage pump 500 is provided on the second electrolyte circulation pipeline 20 from the second liquid storage container 300 to the stack 100.

[0046] According to a preferred embodiment of the present utility model, as Figure 2 and Figure 3 shown, to increase the energy storage capacity, at least one auxiliary liquid storage container is further provided on at least one of the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. Along the height direction, at least one auxiliary liquid storage container is arranged above the generator relative to the generator, and at least one auxiliary liquid storage container is used to store the electrolyte flowing through the circulating drainage pump and the stack 100 during the energy storage stage. In this way, the energy storage capacity of the liquid flow pumping and mixing energy storage device is increased by setting the auxiliary liquid storage container, and the electrolyte obtains more gravitational potential energy by arranging the auxiliary liquid storage container at a high position relative to the generator. Among them, the greater the height difference between the auxiliary liquid storage container and the generator, the more gravitational potential energy the electrolyte obtains.

[0047] According to a preferred embodiment of the present utility model, the auxiliary liquid storage container has a conical structure, and the cross-sectional area of the auxiliary liquid storage container is reduced along the gravity direction. Specifically, as Figure 2 and Figure 3 shown, to recover the remaining kinetic energy of the electrolyte after flowing through the stack 100 to the greatest extent, the auxiliary liquid storage container is arranged in an inverted cone shape. Among them, the liquid storage container and the auxiliary liquid storage container can be regular-shaped containers such as a cuboid, a cylinder, and a sphere, or other irregular-shaped containers, and the present utility model does not limit this either.

[0048] It should be noted that when the fuel cell stack 100 is directly connected to the generator, the electrolyte flowing out of the fuel cell stack 100 directly flows into the generator, which can maximize the recovery of the remaining kinetic energy of the electrolyte after flowing through the fuel cell stack 100. The auxiliary liquid storage container with an inverted cone shape between the fuel cell stack 100 and the generator can not only increase the energy storage capacity but also maximize the recovery of the remaining kinetic energy of the electrolyte after flowing through the fuel cell stack 100.

[0049] Preferably, an auxiliary liquid storage container is provided on each of the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20. Specifically, as Figure 3 shown, an auxiliary liquid storage container with an inverted cone shape is provided on each of the first electrolyte circulation pipeline 10 and the second electrolyte circulation pipeline 20.

[0050] According to an embodiment of the present invention, as Figure 3 shown, to maximize the energy storage capacity and the recovery of kinetic energy to a greater extent, the auxiliary liquid storage container includes a first auxiliary liquid storage container 800 and a second auxiliary liquid storage container 900. The first auxiliary liquid storage container 800 is provided on the first electrolyte circulation pipeline 10, and the second auxiliary liquid storage container 900 is provided on the second electrolyte circulation pipeline 20. Specifically, as Figure 3 shown, along the flowing direction of the electrolyte in the first electrolyte circulation pipeline 10, a first auxiliary liquid storage container 800 located at the upstream end of the first generator 600 is provided on the first electrolyte circulation pipeline 10 from the fuel cell stack 100 to the first liquid storage container 200. Along the flowing direction of the electrolyte in the second electrolyte circulation pipeline 20, a second auxiliary liquid storage container 900 located at the upstream end of the second generator 700 is provided on the second electrolyte circulation pipeline 20 from the fuel cell stack 100 to the second liquid storage container 300. It should be noted that after the fuel cell stack 100 stops working, the first circulation drainage pump 400 drains the electrolyte in the first liquid storage container 200 to the first auxiliary liquid storage container 800 to realize the energy storage of the gravitational potential energy of the electrolyte, and the second circulation drainage pump 500 drains the electrolyte in the second liquid storage container 300 to the second auxiliary liquid storage container 900 to realize the energy storage of the gravitational potential energy of the electrolyte. At this time, the liquid flow pumping and mixing energy storage device only serves as a mechanical energy storage tool, and its working principle is similar to that of pumped-storage energy.

[0051] Based on the above description, the liquid flow pumping and mixing energy storage device provided by the embodiment of the present utility model includes a stack 100 and a liquid storage container arranged at a lower position relative to the stack 100. The electrolyte in the liquid storage container is discharged to the stack 100 and the subsequent pipeline through a circulating drainage pump arranged between the stack 100 and the liquid storage container, and a generator arranged at a lower position relative to the stack 100 fully converts the gravitational potential energy of the electrolyte and part of the kinetic energy brought by the circulating drainage pump to the electrolyte into electric energy, realizing the kinetic energy recovery of the electrolyte and improving the energy utilization rate. At the same time, by arranging an auxiliary liquid storage container with a position higher than the generator between the stack and the liquid storage container, the electrolyte flowing out of the stack 100 is stored to realize the improvement of the energy storage capacity.

[0052] The above are only several embodiments of the present utility model. Those skilled in the art can make various changes or modifications to the embodiments of the present utility model without departing from the spirit and scope of the present utility model according to the content disclosed in the application documents.

Claims

1. A liquid flow pumping and mixing energy storage device, characterized in that Comprising: A fuel cell stack, in which an ion exchange membrane is provided, and the ion exchange membrane divides the fuel cell stack into an anode chamber and a cathode chamber; A liquid storage container, which is arranged below the fuel cell stack in the height direction, and a height difference is formed between the fuel cell stack and the liquid storage container. The liquid storage container includes a first liquid storage container and a second liquid storage container. The first liquid storage container is connected to the anode chamber of the fuel cell stack through a first electrolyte circulation pipeline, and the second liquid storage container is connected to the cathode chamber of the fuel cell stack through a second electrolyte circulation pipeline. Circulation drainage pumps are arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. At least one of the first electrolyte circulation pipeline and the second electrolyte circulation pipeline is provided with a generator, and in the height direction, the generator is arranged below the fuel cell stack; A branch pipeline, which is arranged on the electrolyte circulation pipeline provided with the generator. The branch pipeline has an inlet end and an outlet end opposite to each other along its extending direction. The inlet end and the outlet end are respectively connected to the electrolyte circulation pipelines at both ends of the generator, and the outlet end is located on the electrolyte circulation pipeline between the generator and the liquid storage container; A control valve, which is used to control the flow direction of the electrolyte in the electrolyte circulation pipeline provided with the generator; The liquid flow pumping and mixing energy storage device has a first working state and a second working state during the energy release stage of mechanical energy storage. In the first working state, the control valve conducts the electrolyte circulation pipeline provided with the generator, so that the electrolyte in the fuel cell stack flows through the generator to do work and then enters the liquid storage container; in the second working state, the control valve conducts the branch pipeline, so that the electrolyte in the fuel cell stack directly enters the liquid storage container.

2. The liquid flow pumping and mixing energy storage device according to claim 1, wherein The circulation drainage pumps include a first circulation drainage pump and a second circulation drainage pump. The first circulation drainage pump is arranged on the first electrolyte circulation pipeline, and the second circulation drainage pump is arranged on the second electrolyte circulation pipeline.

3. The liquid flow pumping and mixing energy storage device according to claim 2, wherein Generators are arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. The generators include a first generator and a second generator. The first generator is arranged on the first electrolyte circulation pipeline, and the second generator is arranged on the second electrolyte circulation pipeline.

4. The liquid flow pumping and mixing energy storage device according to claim 2 or 3, characterized in that, At least one auxiliary liquid storage container is further arranged on at least one of the first electrolyte circulation pipeline and the second electrolyte circulation pipeline. In the height direction, at least one auxiliary liquid storage container is arranged above the generator, and at least one auxiliary liquid storage container is used to store the electrolyte flowing through the circulation drainage pump and the fuel cell stack.

5. The liquid flow pumping and mixing energy storage device according to claim 4, characterized in that, The auxiliary liquid storage container has a conical structure, and along the gravity direction, the cross-sectional area of the auxiliary liquid storage container is reduced.

6. The liquid flow pumping and mixing energy storage device according to claim 5, wherein, One auxiliary liquid storage container is arranged on both the first electrolyte circulation pipeline and the second electrolyte circulation pipeline.

7. The liquid flow pumping and mixing energy storage device according to claim 6, wherein The auxiliary liquid storage container includes a first auxiliary liquid storage container and a second auxiliary liquid storage container. The first auxiliary liquid storage container is arranged on the first electrolyte circulation pipeline, and the second auxiliary liquid storage container is arranged on the second electrolyte circulation pipeline.

8. The liquid flow pumping and mixing energy storage device according to claim 3, wherein, The first generator is arranged at a height of -200 cm to 200 cm from the liquid level of the first liquid storage container, and the second generator is arranged at a height of -200 cm to 200 cm from the liquid level of the second liquid storage container.

9. The liquid flow pumping and mixing energy storage device according to claim 8, wherein In the height direction, the first generator is arranged higher than the liquid level of the first liquid storage container, and the second generator is arranged higher than the liquid level of the second liquid storage container.

10. The liquid flow pumping and mixing energy storage device according to claim 1, characterized in that, The control valve includes a first switching valve and a second switching valve. The first switching valve is arranged on the branch pipeline, and the second switching valve is arranged on the electrolyte circulation pipeline between the inlet end and the generator.

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